Sounds similar to this issue. How is your RAM usage? Perhaps the new -C0 flag will help, I dunno.
https://github.com/openstreetmap/osm2pgsql/issues/946 j On Thu, 12 Sep 2019 17:59:06 +0200 Michael Kussmaul <kussmaul.l...@nix.ch> wrote: > Hi > > I'm running my osm2pgsql setup for a couple of years now by > processing the whole planet and doing "--append" updates on a weekly > basis. I have a Debian server and 1.5 TB SSD storage for the planet > and run with flat-nodes configuration. > > I keep my system up-to-date and recently switched to PostgreSQL 11 > and added a SSD disk to my SSD-RAID. Since this change I see a large > drop on nodes processing by approx a factor of 50x (initial import is > doing fine - just when I apply a diff with --append, I now see a > processing rate of about 0.1k/s, it was in the 5k/s before), way and > relation processing is still ok, faster even! > > Before: > Processing: Node(20644k 4.7k/s) Way(2943k 0.59k/s) Relation(65680 > 29.95/s) After: > Processing: Node(30299k 0.1k/s) Way(4609k 1.15k/s) Relation(81710 > 40.57/s) > > So now the whole update process takes longer as if I drop the > complete planet database and start a fresh import, which is > sub-optimal :-) > > It probably boils down to this: > > - Either my new SSD has some performance problem? > - Or PostgreSQL 11 has some regressions? > - osm2pgsql does not work well with PostgreSQL 11? > > I also don't see any I/O bottleneck (iowait is very low <1%), CPU > overall is steady at 25% (12% user, 12% system) > > I also updated osm2pgsql to the newest 1.0 release, but it did not > change anything. > > Now, before I downgrade the DB or replace the disk: Does anybody else > run PostgreSQL 11 and sees similar problems? > > kind regards > Michael > _______________________________________________ > dev mailing list > email@example.com > https://lists.openstreetmap.org/listinfo/dev _______________________________________________ dev mailing list firstname.lastname@example.org https://lists.openstreetmap.org/listinfo/dev